Why is it forbidden to marry within three generations?

Blood relatives mainly refer to relatives who are related to the same ancestor and are related by blood, that is, natural blood relatives; It also includes legally fictitious blood relatives, that is, relatives who are not related by blood, but whose rights and obligations are confirmed by law to be the same as natural blood relatives, such as adoptive parents and adoptive children, and stepparents and stepchildren who are raised and educated by them.

The prohibition of marriage between blood relatives is a requirement of eugenics. The development of human relations between the sexes proves that intermarriage between relatives who are too close by blood is easy to pass on the physiological defects of both parties to their offspring, affecting family happiness and endangering the health of the nation. Marriages between clans that are not related by blood can create a more physically and intellectually robust race.

As a result, the laws of various countries prohibit the marriage of blood relatives within a certain range. For example, Japan's civil law prohibits the marriage of collateral blood relatives within three degrees of consanguinity. The Swiss Civil Code prohibits marriages between lineal and lineal relatives, between brothers and sisters of full or semi-consanguinity, between uncles, uncles and nieces, and between aunts and nephews.

China has long had a saying that "men and women have the same surname, and they are not born", and since the Western Zhou Dynasty, it has been forbidden to marry with the same surname. In the Tang Dynasty, the sentence for marriage with the same surname was two years' imprisonment. The laws of the Ming and Qing dynasties stipulate:

and those who marry with the same surname shall have a rod.

Six. 10. Divorce. At the end of the Qing Dynasty, the prohibition of marriage with the same surname was changed to the prohibition of marriage of the same clan. Taiwan's "Civil Law" prohibits the following relatives from marrying:

1) Lineal blood relatives and lineal in-laws;

2) Those who are collateral blood relatives within the sixth degree of kinship, except for those who are established by adoption as a result of the fourth degree of kinship and those who are of the same generation;

3) Collateral in-laws are within the five degrees of kinship, and those of the same generation are not subject to this limit.

After the founding of the People's Republic of China, in addition to prohibiting the marriage of lineal blood relatives, siblings, and half-brothers and sisters, the Marriage Law also made customary provisions on the prohibition of marriage between other collateral blood relatives within five generations. In addition to retaining the prohibition of marriage between lineal blood relatives, the Marriage Law also clearly stipulates that marriage between collateral blood relatives within three generations is expressly prohibited. The revised Marriage Law does not change the scope of the prohibition of consanguinity marriage.

That is, there are two categories of blood relatives whose marriage law prohibits marriage:

1) Direct blood relatives. Including between parents and children, between grandparents and grandchildren. That is, a father cannot marry a daughter, and a mother cannot marry a son.

A grandfather (grandfather) cannot marry a granddaughter (granddaughter), and a grandmother (grandmother) cannot be married to a grandson (grandchild).

2) Collateral blood relatives within three generations. Including: (1) Brothers and sisters from the same parents (including half-brothers and sisters).

That is, children of the same parent cannot marry each other. (2) Uncles, uncles, aunts, nephews and nephews of different generations. That is, an uncle (uncle) cannot marry the daughter of a brother (brother); The aunt could not marry her brother's son; An uncle could not marry a sister's daughter; An aunt cannot marry a sister's son.

From the generation that has a common ancestor, the first generation is counted, and so on. If the cousins get married, the maternal grandmothers of both parties belong to the first generation, the mothers of both parties belong to the second generation, and the cousin union is the third generation.

China's marriage law stipulates that blood relatives within three generations are prohibited from marrying, including the third generation, that is, cousins are prohibited from marrying. In the "Interpretation of the Marriage Law of the People's Republic of China", the original text is as follows: "(2) Collateral blood relatives within three generations. Includes:

1) Siblings from the same parents (including half-siblings and half-siblings). That is, children of the same parent cannot marry each other.

(2) Uncles, uncles, aunts, nephews and nephews of different generations. That is, an uncle (uncle) cannot marry the daughter of a brother (brother); The aunt could not marry her brother's son; An uncle cannot marry a sister's daughter; An aunt can't marry a sister's son. "There are only three generations between the fathers and the children.

Marriage between close relatives is prohibited:

Because consanguineous couples have more of the same genes, they are prone to pass on recessive harmful genes that are detrimental to survival (i.e., homozygous) in their offspring, so they are more likely to have children of poor quality. The World Health Organization estimates that each person in the population carries about 5 to 6 genes that cause the recessive genetic disease.

In random marriages (non-consanguineous marriages), because the couple is not related by blood, there are few genes in common, and they carry different recessive pathogenic genes, so it is not easy to form homozygous (patients) of recessive pathogenic genes. In the case of consanguineous marriage, it is very likely that the couple will carry the same recessive pathogenic gene, and it is easy to meet in the offspring, which will increase the incidence of genetic diseases in the offspring.

Summary. Dear, I am glad to answer for you: three generations cannot marry refers to counting up to oneself, parents are the second generation, grandparents, maternal grandparents are three generations, resulting in three generations of collateral blood relatives, that is, three generations can not get married.

Siblings from both parents. Both include full-blood siblings of the same father and mother, and half-siblings of half-blood or half-blood. Half-siblings, although nominally referred to as siblings, are not actually related by blood.

Collateral relatives of the same grandparents, including uncles, uncles, aunts, nephews, nieces, uncles, aunts, nephews, and nieces. Collateral relatives of the same generation who originate from their grandparents or maternal grandparents, including cousins and cousins. Since consanguineous couples have more of the same genes, it is easy for recessive harmful genes that are not conducive to survival to be passed on to offspring, so they are prone to give birth to children of inferior quality.

The World Health Organization estimates that each person in the population carries about five to six genes that cause recessive genetic diseases.

Dear, I am glad to answer for you: three generations cannot marry refers to counting up to oneself, parents are the second generation, grandparents, maternal grandparents are three generations, resulting in three generations of collateral blood relatives, that is, three generations can not get married. Siblings from both parents.

All include brothers and sisters of full blood who are of the same father and mother, and suddenly change the half-blood brothers and sisters of half-blood or half-blood. Half-siblings, although nominally referred to as siblings, are not actually related by blood. Collateral relatives of the same grandparents, including uncles, uncles, aunts, nephews, nieces, uncles, aunts, nephews, and nieces.

Collateral relatives of the same generation who originate from their grandparents or maternal grandparents, including cousins and cousins. Since consanguineous couples have more of the same genes, it is easy for recessive harmful genes that are not conducive to survival to be passed on to offspring, so they are prone to give birth to children of inferior quality. The World Health Organization estimates that each person in the population carries about five to six genes that cause recessive genetic diseases.

Article 1048 of the Civil Code of the People's Republic of China Marriage is prohibited for lineal blood relatives or collateral blood relatives within three generations. Is it illegal for close relatives to marry three generations? According to the relevant laws and regulations of our country, direct blood relatives and collateral blood relatives within three generations cannot get married, and if marriage is a violation of the law, the law will not recognize the legality of the marriage between the two, even in the case of obtaining a certificate.

Consanguineous relationships are not conducive to the production of healthy offspring, so the state strongly prohibits this kind of behavior, and for individuals, consanguineous marriage is also very harmful. Guess rough.

Hello, happy to answer your questions. The prohibition of marriage in the three generations refers to one of the "three outlines and five constants" in traditional Chinese culture, which prohibits the marriage of close relatives with the same surname, and the specific objects of the prohibition of marriage include: 1. The prohibition of marriage in one generation is prohibited

Lineal blood relatives, i.e., parents, grandparents, great-grandparents, children, grandchildren, great-grandchildren, etc. 2. Prohibition of marriage in the second generation: collateral blood relatives within three generations, that is, brothers and sisters, aunts, aunts, etc.

3. Three generations of forbidden marriage: collateral blood relatives within four generations, that is, cousins, cousins, etc. This prohibition of marriage is intended to prevent the occurrence of genetic defects and genetic diseases caused by inbreeding, as well as cultural and social considerations such as maintaining the purity of family quarrels and preventing intra-family strife.

In modern society, this prohibition and infiltration of marriage has gradually faded, but it still exists in some areas with stricter cultural inheritance and religious beliefs.

The prohibition of marriage in the third generation refers to collateral blood relatives who are from the same grandparents.

Such as nieces (daughters), nephews (daughters), cousins, aunts and cousins, aunts and cousins, etc. In addition, Wang Yuhong is also forbidden to marry between direct blood relatives.

Marriage is prohibited between lineal blood relatives or collateral blood relatives within three generations. A man and a woman who wish to marry shall apply for marriage registration in person at the marriage registration office. If the provisions are met, it shall be registered, and a marriage certificate shall be issued to destroy the rent.

The marriage relationship is established after the marriage is registered. Where marriage registration has not been completed, the registration shall be re-registered.

A man and a woman who wish to marry shall apply for marriage registration in person at the marriage registration office. Where the provisions of this Law are met, they shall be registered and a marriage certificate shall be issued. The marriage relationship is established after the marriage is registered. Where marriage registration has not been completed, the registration shall be re-registered.

The range of inconsanguineous marriages is not possible

1. Of course, there can be no marriage between parents and children, between grandparents and grandchildren, between grandparents, grandparents and grandchildren.

2. You can't marry your uncle, uncle, aunt, or aunt. Trapped book.

3. You cannot marry your own siblings, cousins, or cousins.

4. Brothers and sisters from the same parents (including half-brothers and sisters). That is, children of the same parent cannot marry each other.

5. Uncles, uncles, aunts, uncles, nieces and nephews of different generations. That is, an uncle (uncle) cannot marry the daughter of a brother (brother);

6. An aunt cannot marry her brother's son; An uncle could not marry a sister's daughter; An aunt cannot marry a sister's son.